Combined fan and cooling device using the same

Abstract

A combined fan for cooling a heat source includes a hub and multiple blades. The hub has a first side and a second side opposite to each other. The blades are distributed along an outer circumferential surface of the hub, and each of the blades includes a first part extending from the hub and a second part connected to the first part. Each of the second parts protrudes beyond the first side or the second side, and each of the second parts is formed by multiple strip structures. Therefore, each of the strip structures can be closer to a surface of the heat source to dissipate the heat more effectively.

What is claimed is: 
     
         1 . A combined fan, comprising:
 a hub including a first side and a second side opposite to each other; and   a plurality of blades, each of the blades being distributed along an outer circumferential surface of the hub, each of the blades including a first part extending from the hub and a second part connected to the first part, wherein each of the second parts protrudes beyond the first side or the second side, and each of the second parts is formed by a plurality of strip structures.   
     
     
         2 . The combined fan of  claim 1 , wherein the material of each of the strip structures includes graphite or metal. 
     
     
         3 . The combined fan of  claim 1 , wherein each of the first parts is of greater rigidity than the rigidity of each of the second parts. 
     
     
         4 . The combined fan of  claim 1 , wherein each of the first parts is integrally formed with each of the second parts. 
     
     
         5 . The combined fan of  claim 1 , wherein each of the second parts and each of the first parts are formed by an insert-molding method. 
     
     
         6 . The combined fan of  claim 1 , further comprising a plurality of brush devices, each of the brush devices being combined with each of the second parts and fixedly attached to one side surface of each of the blades. 
     
     
         7 . The combined fan of  claim 6 , wherein each of the brush devices further includes a joining portion for combining and fixing each of the strip structures. 
     
     
         8 . A cooling device for cooling a heat source, comprising:
 a combined fan including:   a hub having a first side and a second side opposite to each other; and   a plurality of blades, each of the blades being distributed along an outer circumferential surface of the hub, and each of the blades including a first part extending from the hub and a second part connected to the first part, wherein each of the second parts protrudes beyond the first side or the second side, and each of the second parts is formed by a plurality of strip structures; and   a housing receiving the combined fan, each of the second parts being disposed toward the heat source.   
     
     
         9 . The cooling device of  claim 8 , wherein the material of each of the strip structures includes graphite or metal. 
     
     
         10 . The cooling device of  claim 8 , wherein each of the first parts is of greater rigidity than the rigidity of each of the second parts. 
     
     
         11 . The cooling device of  claim 8 , wherein each of the first parts is integrally formed with each of the second parts. 
     
     
         12 . The cooling device of  claim 8 , wherein each of the second parts and each of the first parts are formed by an insert-molding method. 
     
     
         13 . The cooling device of  claim 8  further including a plurality of brush devices, and each of the brush devices being combined with each of the second parts and fixedly attached to one side surface of each of the blades. 
     
     
         14 . The cooling device of  claim 13 , wherein each of the brush devices further includes a joining portion for combining and fixing each of the strip structures. 
     
     
         15 . The cooling device of  claim 8 , wherein the housing includes a first outer case, a second outer case covering the first outer case, and an air outlet, the first outer case has a suspension shaft and at least one air inlet, the at least one air inlet is in a direction perpendicular or corresponding to the direction of the air outlet. 
     
     
         16 . The cooling device of  claim 8 , wherein one side surface of the housing is attached to a surface of the heat source, each of the strip structures is in contact with or in non-contact with the housing or the surface of the heat source, when each of the strip structures is in non-contact with the housing or the surface of the heat source, a gap is formed between each of the strip structures and the housing or between each of the strip structures and the surface of the heat source.